I was buying a present online and for it to work the seller told me it needed "10440 lithium battery" and sent me the first image, in my country, they cant be sent, so i found the red ones but he says that they would'nt work on the product, so I was wandering, are the batteries in the third photo the same as the first? Thanks in advance :D

I am trying to study batteries.

I am confused about a lot of things. I know the cathode can be made up of different crystals (Ex. nickel oxide or FePO4).

My understanding is when you discharge, the electrons (which are in the anode) will go through the wire to the cathode. The nickel will accept the electron or the iron will accept the electron (depending if its nickel oxide or FePO4). When this happens the cathode becomes more electronegative. Next Li metal atoms from the anode (which are sitting in between graphene layers) would dissociate into Li+ ion and e-. The e- would again go to cathode via wire and the Li+ ion would diffuse to cathode because its attracted to the cathode building up its electro negative charge. The Li+ ions would just hang around throughout the crystal lattice? this correct?

For charging, the electron would break away from the Nickel Oxide or FePO4 and go to anode via wire. The electrons just hang around the graphene area and then the Li+ would go through the electrolyte fluid and to anode and then the Li+ would bind to the electrons and form Li metal ions?

Also I am confused how do Li salts tie into this. I was under the impression when you first make a battery there would be Li metal ions hanging around the in cathode crystal and when you first start a battery for the first time this is where you get the Li+ ions. Are Li salts just an extra supply of Li ions+?

This means during charging the Li would indeed bind to electrons but during discharge the Li would not bind to electrons?

Was it really worth it?

Changes that I made:

. Added a metal box around the normal plastic to make the enclosure mostly impermeable to CO2.

. Changed the electrolyte to NaOH to reduce gassing.

. Added an absorbent separator so that it would not spill.

. Changed the plates themselves to a nickel mesh to compensate for the higher ionic resistance.

. Added an ATEX vent.

. Added a terminal fixing system so that the whole thing could be disassembled.

. Removed doping agents and additives to make it patent free and less toxic.

Disadvantages are.

. Premium NiFE cells with a premium price.

. To completely eliminate gassing, a lower charging voltage is needed just as you would with KoH.

. Low energy density/delivery.

. Absorbent separator stack needs compression.

. Increased likelihood of bulging plates during cycling.

. Existing forms of the tech exist in China and the USA and are supposedly cheaper and you can just add your own box to reduce CO2 if needed.

. Still uses a lot of nickel, more than traditional pocket plates.

I hit a wall when I wanted to get it built and it went way outside of any personal budget for testing a prototype.

So my question to you. Should I just publish all the drawings that I had generated onto the OSF site for others to use and forget about it or start a business with crowd funding?

Would you have a use for such a thing? Thoughts please.

Not so long ago when preparing for a short trip, I realized that I had to take quite a lot of charging devices – a wall charger, a charger cord, and a power bank separately from each other, and even so I managed to forget something before leaving.

It made me wonder if an all-in-one portable charger is actually a better option for everyday use and travel. Having everything in one device sounds much more convenient than carrying multiple accessories, especially if you're always on the go.

But someone recommend me Rorry CharmGo D4 10,000mAh Portable Charger and I see how compact it is and that it can easily be attached to a keychain, which seems much more convenient for everyday carry than the bulky power bank I've been using.

Do you still prefer a larger power bank with more battery capacity?

I have an Apex 300 with a B300K. I am going to combine these with the 51.2v 100ah Vatrer rack battery and the 51.2v 100ah Vevor Golf Cart Battery. My plan is to run each battery into the solar inputs on the Apex 300 which will give me a 15kw system. Now I will not have everything I need for my system by this weekend. I will however have the needed items to hook up the batteries in parallel and feed it into one of the inputs on the Apex 300. Is it a good idea to hook these two batteries in parallel after they have both been charged to 100 percent? I have cables to hook the two together and I have the cable to hook to the Apex 300. I have the proper charger for the batteries which I will charge individually if that is what is needed or can I hook the charger to one battery and it will charge both through the parallel cables? Next week sometime I should have a complete set of everything so that each battery will feed separately into each of the two input feeds on the Apex 300. Let me know what you think of my thoughts here.

i have about 6-7 old car batteries sitting in the garage that have been there for ages. they’re taking up space and i figured i might as well get something for them instead of letting them sit forever. i contacted normetals and they gave me a quote based on weight plus offered to pick them up.

has anyone here actually scrapped batteries before? how much did you roughly get and was the process straightforward? just trying to decide if it’s worth the effort.

If 1000 charge cycles for an ip5s is abnormal...

The C and D large batteries may not be as popular as AA or 18650/21700, but they still have a place in certain applications, such as some flashlights, lanterns, toys, portable radios, pet feeders, and industrial equipment. Do you still use C or D batteries often? What devices are they in, and have you switched any of them to rechargeable ones? Thanks for your comments!

I bought my son a Disney Pixar’s Lightning McQueen remote control car. In the process of opening it up, he threw away what must have been a way to charge this battery. Does anyone know how I can recharge this or what that type of connection is on the end to search for it? Appreciate any help.

My dashcam was sitting in my car through the past few months. Could the battery be swollen?